Pipe bombs, a targeted car crash, a lone gunman: Western intelligence officials said Friday they are seeing increased Internet and phone chatter about cheap, small-scale terror attacks to avenge the death of 9/11 mastermind Osama bin Laden.

Britain is considering setting up secretive courts to make it easier to prosecute terror suspects and to hold them without charge for longer than the current 14 days as part of the crackdown following the deadly London bombings, officials said Tuesday.